org.jetbrains.kotlin.resolve.jvm.checkers.InterfaceDefaultMethodCallChecker.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.resolve.jvm.checkers

import com.intellij.psi.PsiElement
import org.jetbrains.kotlin.config.JVMConfigurationKeys
import org.jetbrains.kotlin.config.JvmTarget
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.ClassifierDescriptor
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.load.java.descriptors.JavaCallableMemberDescriptor
import org.jetbrains.kotlin.resolve.DescriptorUtils
import org.jetbrains.kotlin.resolve.DescriptorUtils.*
import org.jetbrains.kotlin.resolve.calls.callResolverUtil.getSuperCallExpression
import org.jetbrains.kotlin.resolve.calls.checkers.CallChecker
import org.jetbrains.kotlin.resolve.calls.checkers.CallCheckerContext
import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm

class InterfaceDefaultMethodCallChecker : CallChecker {

    override fun check(resolvedCall: ResolvedCall<*>, reportOn: PsiElement, context: CallCheckerContext) {
        val supportDefaults = context.compilerConfiguration.get(JVMConfigurationKeys.JVM_TARGET) == JvmTarget.JVM_1_8

        val descriptor = resolvedCall.resultingDescriptor as? FunctionDescriptor ?: return

        if (!supportDefaults &&
            isStaticDeclaration(descriptor) &&
            isInterface(descriptor.containingDeclaration) &&
            descriptor is JavaCallableMemberDescriptor) {
            context.trace.report(ErrorsJvm.INTERFACE_STATIC_METHOD_CALL_FROM_JAVA6_TARGET.on(reportOn))
        }

        if (getSuperCallExpression(resolvedCall.call) == null) return

        if (!isInterface(descriptor.original.containingDeclaration)) return

        val realDescriptor = unwrapFakeOverride(descriptor)
        val realDescriptorOwner = realDescriptor.containingDeclaration as? ClassDescriptor ?: return

        if (isInterface(realDescriptorOwner) && realDescriptor is JavaCallableMemberDescriptor) {
            val classifier = DescriptorUtils.getParentOfType(context.scope.ownerDescriptor, ClassifierDescriptor::class.java)
            //is java interface default method called from trait
            if (classifier != null && DescriptorUtils.isInterface(classifier)) {
                context.trace.report(ErrorsJvm.INTERFACE_CANT_CALL_DEFAULT_METHOD_VIA_SUPER.on(reportOn))
            }
            else if (!supportDefaults) {
                context.trace.report(ErrorsJvm.DEFAULT_METHOD_CALL_FROM_JAVA6_TARGET.on(reportOn))
            }
        }
    }
}